排灌机械工程学报2016，Vol.34Issue(3)：210-215,6.DOI:10.3969/j.issn.1674-8530.15.0009
开缝叶片低比转数离心泵空化性能的数值模拟
Numerical simulation of cavitation performance of low specific speed centrifugal pump with slotted blades
摘要
Abstract
In order to improve cavitation performance of a centrifugal pump,a slot is made through each blade near its leading edge in a low specific speed centrifugal pump.Considering three parame-ters defining a slot,and six hydraulic models are designed.Cavitating flows in these pump models are simulated in CFX by means of steady Reynolds average N -S equations,a cavitation model,which is based on the Rayleigh -Plesset equation,and the RNG k -εturbulence model.The simulated results show that slots on blade near their leading edge can improve cavitation performance,especially,in the second model the pump cavitation performance is improved more obviously,namely the hydraulic effi-ciency is increased to 76.46% from 71.56%,and the NPSH is decreased to 3.910 m from 4.447 m, resulting in a 12.1% reduction.At the duty flow rate,the energy inside the flow channels between the two blades is more uniformly distributed,while the head remains changed a little.The simulated re-sults may have some referential value for investigating features of internal flow in a low specific speed centrifugal pump and its performance improvement.关键词
低比转数离心泵/开缝/空化性能/多相流/数值模拟Key words
low specific speed centrifugal pump/slot/cavitation performance/multi-phase flow/numerical simulation分类
农业科技引用本文复制引用
王洋,谢山峰,王维军..开缝叶片低比转数离心泵空化性能的数值模拟[J].排灌机械工程学报,2016,34(3):210-215,6.基金项目
江苏高校优势学科建设工程项目 （）
